Page 2 of 4 FirstFirst 1234 LastLast
Results 14 to 26 of 52
  1. #14
    Join Date
    Nov 2011
    Location
    East Side
    Posts
    6,692
    Post Likes
    Looks like freeze damage to me. Ive seen heat pump condenser tubes that got crushed from ice buildup, and thats what they look like.

  2. #15
    Join Date
    Jan 2010
    Posts
    17,330
    Post Likes
    Why wouldn't the ice crush the support as well ?
    Attached Images Attached Images  

  3. #16
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,335
    Post Likes
    Quote Originally Posted by VTP99 View Post
    That looks like excessive vacuum and thin wall tubing.
    And a few hundred at the scrap yard!

  4. #17
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    346
    Post Likes
    Could the either reduced operating pressure or possibly being in a vacuum when the water hammer hit have contributed to water hammer being capable of causing that damage? I don't have the slightest clue what the normal operating pressure of that system would be its just a thought.

    Sent from my rotary telephone using Tapatalk

  5. #18
    Join Date
    Oct 2006
    Location
    The Beach
    Posts
    985
    Post Likes
    I would bet on vacuum, Never had this happen. That must have been thin tubbing.
    Blue Fox

  6. #19
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,335
    Post Likes
    Cant say ive ever collapsed tubes with just a vacuum...……….there had to be other pressures involved!

  7. #20
    Join Date
    Dec 2004
    Location
    Chicago area
    Posts
    8,350
    Post Likes

    Collapsed evaporator tubes - anyone seen this before??

    Quote Originally Posted by VTP99 View Post
    Why wouldn't the ice crush the support as well ?
    Cause, energy is lazy. It was easier to crush the tubes then steel support plate. That and it does appear on second look that the support plate is contouring to the pinch down of the tubes.


    Sent from my iPhone using Tapatalk

  8. #21
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    346
    Post Likes
    It seems like if 14.7 PSI was able to crush it from the outside it wouldn't hold up to refrigerant pressure on the inside.
    Quote Originally Posted by lentz View Post
    I would bet on vacuum, Never had this happen. That must have been thin tubbing.
    Sent from my rotary telephone using Tapatalk

  9. #22
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    6,799
    Post Likes
    Quote Originally Posted by PAJoel View Post
    Do you have a better picture of wire tie on the left? It looks tight. If its tight while the tubes are crushed, it could have been this way from the factory.
    "Right" is not the same as "Wise".

    Don't step on my favorite part of the Constitution just to point out your favorite part.

  10. Likes heatingman liked this post
  11. #23
    Join Date
    Nov 2011
    Location
    East Side
    Posts
    6,692
    Post Likes
    I could buy that, except they undercharged and restarted it. it ran fine for 6 years.....if it has always been that way, it would have shown up by now.

    I've seen air cooled heat pump condenser tubes that were crushed flat inside the aluminum fins, but the fins had zero damage.....I couldn't understand how it happened without damaging the aluminum, but it did.

    this was prolly a perfect storm of several contributing factors.....

  12. #24
    Join Date
    Dec 2004
    Location
    Chicago area
    Posts
    8,350
    Post Likes
    Quote Originally Posted by jayguy View Post
    Do you have a better picture of wire tie on the left? It looks tight. If its tight while the tubes are crushed, it could have been this way from the factory.
    Thats a good theory. Most heat exchangers of this design I see are rated to 300 psi or better, shell and tube side.


    Sent from my iPhone using Tapatalk

  13. #25
    Join Date
    Mar 2016
    Location
    Marengo, IL
    Posts
    46
    Post Likes
    What is the MAWP and what was the system pressure? The failure mechanisms of burst and collapse are very different, just because something is rated for a certain internal psi doesn't mean it will hold up to the same pressures externally.

  14. #26
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    6,434
    Post Likes
    I had a 2 door reach in cooler do that to the tube bends

    Only thing i could imagine was ice

Page 2 of 4 FirstFirst 1234 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •